I have not seen the application using the driver, but
a better abstraction IMHO would be to take an abstraction
you have in your application and move it into the kernel.
I can be more specific if you tell me where to find the
source of the application. Generally speaking, you'd
transform a function like
/* the function that knows how to do 'this' */
int phub_do_this(int phub_fd, unsigned long arg)
{
struct pch_phub_req req = {
.addr_offset = SOME_ADDR_OFF,
};
ioctl(fd, IOCTL_PHUB_READ_REG, &req);
if (req.data & SOME_BITS)
return ERROR;
req.addr_offset = ANOTHER_ADDR_OFF;
req.data = arg | REALLY_DO_IT_BITMASK;
ioctl(fd, IOCTL_PHUB_WRITE_REG, &req);
return 0;
}
into another function that does the same thing but
without knowing anything about the registers:
/* the same function on the abstract interface */
int phub_do_this_new(int phub_fd, unsigned long arg)
{
return ioctl(phub_fd, IOCTL_PHUB_DO_THIS, &arg);
}
Arnd
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